<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Try catch</title>
<script type="text/javascript">
function showMessage()
{
	try
	{
		allert("Welcome guest!");		
	}
	catch (err)
	{
		alert(err.message);
	}
}
</script>
</head>
<body>
<input type="button" value="View message" onClick="showMessage()" />
</body>
</html>